campbell



(No Model.) 2 Sheets-Sheet 1.

G. B. CAMPBELL.

ROLLER MILL.

No. 272,644. Patented Feb. 20,1883.

- w i H v) o m mr, Washington. a. c.

(No Model.)

2 Sheets-Sheet 2. 0. B. CAMPBELL.

ROLLER MILL.

Patented Feb. 20, 1883.

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N. PETERS. Pmwum w. Wuhingwn. nu

NHED STATES PATENT Brice.

CHARLES B. CAMPBELL, 0F BUFFALO, NEW YORK.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 272,644, dated February 20, 1883. Application filed February 25, 1882. (No model.)

To all whom it may concern Be it known that l, UHARLES B. CAMPBELL, of the city of Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Roller-Mills, of which the following is a specification.

This invention relates to an improvement in roller-mills, whereby the roller-bearingsare rendered verticallyadjustable,aud whcrebythe movable roller can be readily adjusted toward and from the stationary roller, and be separated from the stationary roller, for facilitating the starting of the mill without disturbing the adjustment'of the movable roller.

My invention consists of the particular constrnction of the mechanism whereby these adjustments are effected, aswvill be hereinafter fully set forth and claimed.

In the accompanying drawings, Figure 1 is a side elevation ofa roller-mill provided with my improvement. Figf2 is an end elevation, and Fig. 3 a top plan view, thereof. Figs. 4.

and 5 are vertical sectionsin lines a: wand yy,

Fig. 1, respectively. Fig. 6 is a sectional elevation of the detachable worm-wheel. Fig. 7 is a vertical section in line 2 2, Fig. 2, on an large'd scale.

Like letters of reference refer to like parts in each of the figures.

The supporting-frame of the roller-mill consists of side frames, A A, and connecting top cross-pieces, A A, preferably cast together in one piece.

B represents the roller which has no horizontal adjustment, and O the roller which is made movable toward and from the roller B. The latter is supported in bearings D, provided with aspherical enlargement,d. which 18 seated in a box, E, inclosing the bearings D, and having a spherical recess, e, in which the spherical enlargements of thebearings D turn. and whereby the bearings are enabled to adjust themselves to the roller-journals. Any other suitable construction of bearings may, however, be adopted, if preferred.

f represents a vertical cylindrical shank formed on the lower portion of the box E, and g is a cylindrical socket cast with the side frame, A, and receiving the shank f, which can be adjusted vertically in the socket g, to raise and lower the journal-box.

His a screw-bolt projecting downward from the shank, to which it is secured, and passing loosely through a lug, h, cast with the side frame, A.

h h are screw-nuts applied to the boltH respectively above and below the lug h, and bearing against the latter, whereby the journal-box is firmly supported in the desired position. By adjusting the screw-nuts h It on the bolts H, the journal-boxes D E and the roller B, supported therein, are raised and lowered, as may be desired.

I represents thejournal-boxes in which the movable roller 0 is supported, and which inclose spherical bearings I, of the same construction as the bearings D of the roller B. The boxes I are each pivoted by a horizontal bolt,j, to the head j of a vertical screw-bola whichpasses looselythrough a lug, J, cast on the side frame, A, and which is secured in position by screw-nuts Ic Ir, which are applied to the bolt 3" respectively above and below the lug J, and which bear against the upper and lower sides of the lug, as shown. By adjusting the nuts k k on the boltjflthe latter and the roller bearing attached thereto are raised I and lowered, as may be desired.

' L represents an outwardly-projecting arm, formed with each hearing I, and l is a vertical screw-bolt, which passes loosely. with its upper portion through an opening, l, in the arm L. The lower end of the screw-bolt is provided with an eye or ring, m, which is fitted on an eccentric, m. The two eccentrics on opposite sides of the machine are mounted on the same shaft, m so that both eccentrics are simultaneously turned.

m is a Weighted arm, which. is centrally attached to the shaft m in such a position that when it depends from the shalt, as represented in Fig. 1, the eccentrics m will assume their highest position. The shaft 111. turns in bracket-bearings or, cast with or secured to the side frames, A.

n represents a spiral spring which surround each bolt Z, and bears with its uppereud against a washer, n, which is interposed between the spring and the lower side of the arm L. The spring a rests upon a Washer, 127, which is supported by one or more screw-nuts, a applied to the bolt 1.

0 represents a screw-nut which works on the upper threaded end of the bolt Z, and bears against the upper side of the arm L. The nut O is provided with a gear-wheel, O, which is cast with or rigidly secured to the nut O.

19 represents a horizontal shalt which turns in bracket-bearings secured to or castwith the arms L, and 19 19 are two worm-wheels mounted on the shattp and engaging with the gear-wheels O.

p is a hand-wheel secured centrally to the shaft 1) for rota ingthe same. The worm-wheel p is rigidly attached to the shaft 1), and the worm-wheel 1) is so attached that it can be loosened when desired. As shown in Fig. 6, the worm-wheel turns on a sleeve, q, whichiis secured to the shaft 29, and provided at one end with a collar, q, and at the opposite end with ascrew-threathq The worm-wheelisclamped between the collar and a screw-nut, q", which is applied to the thread (1 By turning the shaft 79 in one or theother direction the si-rewnuts 0 are raised or lowered on the boltsl, and the outer endsof the arms L are raised or lowered accordingly, whereby the roller (J is adjusted toward or from the roller B. It" the roller C should happen to be out of line with the roller B,the worm-wheelp is disconnected from the shaft 12 by releasing the nut when the screw-nut 0, which is operated by the wheelp can be turned by hand until theroller O is parallel with the roller B, when the wheel 19 is again secured to the shalt p by tightening the nut (1 The openings Z, through which the bolts 6 pass, in the arms L are preferably made flaring downwardly, as shown, to pre' vent the bolts from binding therein when the bearings I are raised or lowered by the screwbolts j Upon turning the shaft m by means of the weighted arm m so as to lower the eccentrics 1n, the bolts 1 and the outer ends of the arms L, connected therewith, are drawn downward, thereby swingingthe roller 0 away from the roller B without disturbing the adjustmentof the roller 0. The weighted arm m serves to maintain the eccentrics m in their highest. position.

In my improved roller-mill thejoints whereby the jom'nal-boxes are attached to the frame and to the adjusting mechanism can all be finished by turning and boring, thereby reducint, the cost of construction considerably.

I claim as my invention- 1. The combination, with the roller 0, of bearings I, provided with arms L, verticallyadjustahle supports j(, to which the arms Lare pivoted, screw-bolts l, screw-nuts 0, provided with gear-wheels O, a shaft. 19, supported on the arms L, and worm-wheelsp, secured to the shaft and meshing with the gear-wheels 0, substantially as set forth.

2. Thecoinbination, with the shaft 19, of the sleeve q, secured thereto and-provided with a collar, q, and screw-thread (l screw-nut g and a gear-wheel, p clamped on the sleeve q, between the collar q and the screw-nut g substantially as set lorth.

CHARLES B. CAMPBELL.

Witnesses:

Juo. J. BONNER, EDW. J. BRADY. 

